SysUtils.StrCat Function

Appends a copy of Source to the end of Dest and returns the concatenated string.

Pascal

function StrCat(Dest: PChar; const Source: PChar): PChar;

C++

const char * StrCat(const char * Dest, const const char * Source);

File

SysUtils

Description

Use StrCat to concatenate Source to the end of Dest. StrCat does not perform any length checking. The destination buffer must have room for at least StrLen(Dest)+StrLen(Source)+1 characters.

To check length, use the StrLCat function.

C++ Examples:

Copy Code

/*
The following example uses an edit control, a label, and a button
on a form. When the button is clicked, the label’s caption and the
edit control’s text are combined in a buffer. Then the buffer is
displayed in the label’s caption.
*/
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  char* szBuffer = new char[Label1->Caption.Length() + Edit1->Text.Length() + 1];
  // The following 2 lines are used in VCL applications
  StrCopy(szBuffer, Label1->Caption.c_str());
  StrCat(szBuffer, Edit1->Text.c_str());
  Label1->Caption = szBuffer;
  Edit1->Clear();
  delete [] szBuffer;
}

Delphi Examples:

Copy Code

{
The following example uses an edit control, a label, and a button
on a form. When the button is clicked, the label’s caption and the
edit control’s text are combined in a buffer. Then the buffer is
displayed in the label’s caption.
} 
procedure TForm1.Button1Click(Sender: TObject);
var
  Buffer: PChar;
begin
  GetMem(Buffer,Length(Label1.Caption) + Length(Edit1.Text) + 1);
  StrCopy(Buffer, PChar(Label1.Caption));
  SysUtils.StrCat(Buffer, PChar(Edit1.Text));
  Label1.Caption := Buffer;
  Edit1.Clear;
  FreeMem(Buffer);
end;